In article number 1804218, Jordan A. Hachtel, Boris I. Yakobson, Chandra Sekhar Tiwary, Pulickel M. Ajayan, and co‐workers demonstrate that simple annealing of a 2D quaternary (Mo–W–S–Se) alloy results in a thermodynamically stable atomically thin heterostructure of Mo–S–Se and W–S–Se. Transition‐metal‐dichalcogenide alloys (Mo–W–S or Mo–W–Se) are more stable due to negative entropy of mixing.

Published in: "Advanced Materials".